feat: added print_count api, added merchant setting model, added manual mode setting for purchase order

business/services.py

@@ -1,21 +1,25 @@
 from __future__ import annotations
 
-from typing import Any, Dict, List
-
-from django.db import transaction
-
+import logging
 from datetime import date, datetime
-from decimal import Decimal
-from typing import Any, Dict, List
+from decimal import Decimal, InvalidOperation
+from typing import Any, Dict, List, Tuple
 
+from django.contrib.auth import get_user_model
 from django.db import transaction
 
 from basic_info import models as basic_info_models
+from stock import models as stock_models
+from stock.services import StockFlowService
+from basic_info.services import MerchantSettingService
 
 from . import models
 from .tasks import create_purchase_order_stock_entries
 
 
+logger = logging.getLogger(__name__)
+
+
 def _normalize_order_date(value) -> date:
     if isinstance(value, date):
         return value
@@ -34,8 +38,8 @@ def create_purchase_order(
     merchant: basic_info_models.Merchant,
     supplier: basic_info_models.Supplier,
     order_date,
-    total_amount,
-    warehouse_id: int,
+    warehouse: basic_info_models.WareHouse,
+    operator: basic_info_models.Employee,
     items: List[Dict[str, Any]],
     remarks: str | None = '',
     created_by=None,
@@ -47,40 +51,190 @@ def create_purchase_order(
         merchant: 采购单所属商户
         supplier: 供应商
         order_date: 订单日期 (date)
-        total_amount: 总金额
-        warehouse_id: 入库仓库ID
-        items: 产品明细，格式示例：
-            [
-                {'product_id': 1, 'quantities': ['10.00', '5.00']},
-                {'product_id': 2, 'quantities': ['3.50']},
-            ]
-            该结构会被传递给 StockFlowService，需满足其模式要求。
+        warehouse: 入库仓库实例
+        operator: 经办人
+        items: 产品明细，字段会根据仓库模式校验
         remarks: 备注
         created_by: 创建者用户（可选，用于 stock 记录中的 created_by）
     """
     if not items:
         raise ValueError('items 不能为空')
-    if not warehouse_id:
-        raise ValueError('warehouse_id 不能为空')
 
     normalized_date = _normalize_order_date(order_date)
-    total_amount = Decimal(str(total_amount))
+    purchase_items, stock_flow_items = _normalize_purchase_items(
+        merchant=merchant,
+        warehouse=warehouse,
+        items=items,
+    )
 
     with transaction.atomic():
         purchase_order = models.PurchaseOrder.objects.create(
             merchant=merchant,
             supplier=supplier,
-            order_date=normalized_date,
-            total_amount=total_amount,
+            purchase_date=normalized_date,
+            operator=operator,
+            warehouse=warehouse,
             remarks=remarks,
         )
+        bulk_objects = [
+            models.PurchaseOrderItem(
+                purchase_order=purchase_order,
+                product=item_data['product'],
+                price=item_data['price'],
+                color=item_data.get('color'),
+                quantity=item_data['quantity'],
+                unit=item_data['unit'],
+                empty_diff_percent=item_data['empty_diff_percent'],
+                quantity_of_rolls=item_data.get('quantity_of_rolls'),
+                num_of_rolls=item_data['num_of_rolls'],
+                batch_number=item_data.get('batch_number'),
+                remarks=item_data.get('remarks'),
+            )
+            for item_data in purchase_items
+        ]
+        models.PurchaseOrderItem.objects.bulk_create(bulk_objects)
 
     created_by_id = getattr(created_by, 'id', None)
-    create_purchase_order_stock_entries.delay(
-        purchase_order_id=purchase_order.id,
-        warehouse_id=warehouse_id,
-        items=items,
-        created_by_id=created_by_id,
-    )
+    if MerchantSettingService.get_setting(merchant, basic_info_models.MerchantSettingKeyEnum.AUTO_CREATE_STOCK_CHANGE_TASKS).value is True:
+        logger.info('自动创建出入库记录任务已开启，创建入库记录任务')
+        create_purchase_order_stock_entries.delay(
+            purchase_order_id=purchase_order.id,
+            warehouse_id=warehouse.id,
+            items=stock_flow_items,
+            created_by_id=created_by_id,
+        )
     return purchase_order
 
+
+def _normalize_purchase_items(
+    *,
+    merchant: basic_info_models.Merchant,
+    warehouse: basic_info_models.WareHouse,
+    items: List[Dict[str, Any]],
+) -> Tuple[List[Dict[str, Any]], List[Dict[str, Any]]]:
+    """
+    根据仓库模式校验采购明细，并返回
+    - purchase_items: 用于创建 PurchaseOrderItem
+    - stock_flow_items: 传递给 StockFlowService 的 items 结构
+    """
+    purchase_items: List[Dict[str, Any]] = []
+    stock_flow_items: List[Dict[str, Any]] = []
+
+    warehouse_mode = warehouse.mode
+
+    for index, raw_item in enumerate(items):
+        product_id = raw_item.get('product_id')
+        if not product_id:
+            raise ValueError(f'items[{index}].product_id 不能为空')
+        try:
+            product = basic_info_models.Product.objects.get(id=product_id, merchant=merchant)
+        except basic_info_models.Product.DoesNotExist as exc:
+            raise ValueError(f'产品 {product_id} 不存在或不属于当前商户') from exc
+
+        price = _to_decimal(raw_item.get('price', '0'), f'items[{index}].price')
+        empty_diff_percent = _to_decimal(raw_item.get('empty_diff_percent', '0'), f'items[{index}].empty_diff_percent')
+        color = raw_item.get('color')
+        batch_number = raw_item.get('batch_number')
+        remarks = raw_item.get('remarks')
+        unit = raw_item.get('unit') or product.get_unit_display() or '米'
+
+        if warehouse_mode == basic_info_models.WareHouseModeEnum.UNRESTRICTED:
+            if 'numbers' in raw_item and raw_item['numbers']:
+                raise ValueError(f'仓库为宽进模式，items[{index}] 不应提供 numbers')
+            quantity = _to_positive_int(raw_item.get('quantity'), f'items[{index}].quantity')
+            num_of_rolls = _to_positive_int(raw_item.get('num_of_rolls'), f'items[{index}].num_of_rolls')
+            quantity_of_rolls = None
+            stock_flow_items.append({
+                'product_id': product.id,
+                'value': str(quantity),
+                'num_of_rolls': num_of_rolls,
+            })
+        else:
+            numbers = raw_item.get('numbers')
+            if not numbers or not isinstance(numbers, list):
+                raise ValueError(f'仓库为严进模式，items[{index}] 需要提供 numbers 数组')
+            normalized_numbers = [
+                str(_to_positive_int(value, f'items[{index}].numbers[{pos}]'))
+                for pos, value in enumerate(numbers)
+            ]
+            num_of_rolls = len(normalized_numbers)
+            quantity = sum(int(val) for val in normalized_numbers)
+            quantity_of_rolls = ','.join(normalized_numbers)
+            stock_flow_items.append({
+                'product_id': product.id,
+                'quantities': normalized_numbers,
+            })
+
+        purchase_items.append({
+            'product': product,
+            'price': price,
+            'color': color,
+            'quantity': quantity,
+            'unit': unit,
+            'empty_diff_percent': empty_diff_percent,
+            'quantity_of_rolls': quantity_of_rolls,
+            'num_of_rolls': num_of_rolls,
+            'batch_number': batch_number,
+            'remarks': remarks,
+        })
+
+    return purchase_items, stock_flow_items
+
+
+def create_purchase_order_stock_entries_sync(
+    *,
+    purchase_order_id: int,
+    warehouse_id: int,
+    items: List[Dict[str, Any]],
+    created_by_id: int | None = None,
+) -> Dict[str, Any]:
+    """
+    根据采购单生成入库记录。
+    """
+    try:
+        purchase_order = models.PurchaseOrder.objects.select_related('merchant').get(id=purchase_order_id)
+    except models.PurchaseOrder.DoesNotExist:
+        logger.error('PurchaseOrder %s 不存在，无法创建入库单', purchase_order_id)
+        return {'error': 'purchase_order_not_found', 'purchase_order_id': purchase_order_id}
+
+    merchant = purchase_order.merchant
+
+    created_by = None
+    if created_by_id:
+        UserModel = get_user_model()
+        created_by = UserModel.objects.filter(id=created_by_id).first()
+
+    service = StockFlowService(merchant=merchant, created_by=created_by)
+    record, details, created_count = service.stock_in(
+        warehouse_id=warehouse_id,
+        source_type=stock_models.StockChangeSourceEnum.PURCHASE,
+        source_id=purchase_order.id,
+        items=items,
+    )
+
+    payload = {
+        'purchase_order_id': purchase_order.id,
+        'stock_change_record_id': getattr(record, 'id', None),
+        'created_details_count': created_count,
+    }
+    logger.info('采购单 %s 入库任务完成: %s', purchase_order.id, payload)
+    return payload
+
+
+def _to_decimal(value, field_name: str) -> Decimal:
+    try:
+        return Decimal(str(value))
+    except (InvalidOperation, TypeError) as exc:
+        raise ValueError(f'{field_name} 必须是合法数值') from exc
+
+
+def _to_positive_int(value, field_name: str) -> int:
+    if value is None:
+        raise ValueError(f'{field_name} 不能为空')
+    decimal_value = _to_decimal(value, field_name)
+    if decimal_value <= 0:
+        raise ValueError(f'{field_name} 必须大于 0')
+    if decimal_value != decimal_value.to_integral_value():
+        raise ValueError(f'{field_name} 必须为整数')
+    return int(decimal_value)
+